African American Cemeteries Forum
More Mt. Auburn Cemetery Resource Info
Here is another link to the Mt. Auburn Cemetery Records currently on-line with the Maryland State Archives:
It is rather lenghty but a very good read on the cemetery and it's "stewards" Sharp Street Memorial Church.
There is also a program from their 175th celebration and a list of Baptisims that include Name, address, parents names and more that is very interesting, but dated (1800's but keep in mind that could be only one or two generations away in your search)